再発|さいはつsaihatsu[0]heiban (flat)

JLPT N1approx.Common
Definitions
  1. noun, suru verb, intransitive verbreturn; relapse; recurrence
    1955年ねんにガンが再発さいはつし、彼女かのじょは1956年ねんに42歳さいで亡なくなった。↗
    In 1955, the cancer returned and she died in 1956 at the age of 42.
Conjugation
Dictionary form再発する(さいはつする)
Polite (masu)再発します(さいはつします)
Negative (nai)再発しない(さいはつしない)
polite (masen)再発しません(さいはつしません)
classical zu / nu再発せず・再発せぬ(さいはつせず・さいはつせぬ)
Past (ta)再発した(さいはつした)
polite (mashita)再発しました(さいはつしました)
Past negative (nakatta)再発しなかった(さいはつしなかった)
polite (masen deshita)再発しませんでした(さいはつしませんでした)
Te form再発して(さいはつして)
Potential再発できる(さいはつできる)
Passive再発される(さいはつされる)
Causative再発させる(さいはつさせる)
Causative passive再発させられる(さいはつさせられる)
Conditional (ba)再発すれば(さいはつすれば)
tara再発したら(さいはつしたら)
Volitional再発しよう(さいはつしよう)
polite (mashou)再発しましょう(さいはつしましょう)
Imperative再発しろ(さいはつしろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Synonyms & antonyms
  • Synonymぶり返すぶりかえすNeutralColloquial: an illness's symptoms or cold weather coming back after subsiding. 「再発」 is more medical, or used for accidents happening again.
  • Related繰り返すくりかえすNeutralTo do the same thing over and over, as in 「過ちを繰り返す」; 「再発」 is about a disease or accident that had subsided happening once more.
  • Related反復はんぷくWrittenWritten, academic word for repeating or iterating an action; 「再発」 is about something that had ended — an illness, accident or other problem — breaking out again.
  • Antonym治癒ちゆWrittenWritten word for a disease or injury being cured; the opposite of 「再発」, where an illness appears again.
  • Antonym完治かんちWrittenWritten word for a complete cure or full recovery; the opposite of 「再発」 in the sense of a disease relapsing.
  • Antonym終息しゅうそくWrittenWritten word for something such as an epidemic ending or dying down; the opposite of 「再発」, which is about things happening again.

Use 「再発」 for a disease relapsing or an accident happening again, as in 「再発防止」. For symptoms or cold weather coming back, say 「ぶり返す」; for repeating actions, 「繰り返す」; 「反復」 is written prose. The opposites are 「治癒」/「完治」 (cure) and 「終息」 (end).

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese definitions
  1. 何なんかが再ふたたび発生はっせいすること。再ふたたび起おきること。
  2. 再さい発売はつばい。
Kanji in this word
English equivalents
See also

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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